Governor



' Feb. 5, 1924. 1,482,447

R. c. STEVENS GOVERNOR Filed Sept. 28 1920 "cs-Sheet 1 rap/M if a faw/INVENTOR.

A TTORNE Y.

,Feb. 5, 1924. 1,482,447

R. C. STEVENS ATTORNEY.

Feb. 5, 1924.

R. C. STEVENS GOVERNOR Filed Sept. 28

1920 I5 Sheets-Sheet 5 ed A. l

I It. .I

INVENTOR.

A TTORNE Y.

Patented Feb. 5, 1924.

UNITED. re s ROBERT 'o. STEVENS, or ERIE, 'LPENNSYLVANIA.

GOVERNOR.

Application filed September 28,1920. Serial No. 413,356.

To (ZZZ whom it may concern:

Be it known that I, ROBERT C. STEVENS, a citizen of the United States,residing at Erie, in the'county of 'Erie and State of Pennsylvania,have'invented new and useful Improvements in Governors, of which thefollowing is a specification.

This invent-ion relates particularly to a governor which will control adouble engine having its cranks set at the usual inclination. With suchan engine it is desirableto have both valves controlled by the samegovernor mechanism so that there may be a nicety and uniformity ofcontrol.

The invention is illustrated in the accompanying drawings as follows:

Fig. 1 shows a plan view of the engine.

Fig. 2 a side elevation of the governor.

Fig. 8 a section on the lines 3-3'3 in F ig. 2.

Fig. 4 a section on the line 1-4 in Fig. 2.

Theengines 1 and 2 have a common crank shaft 3 with cranks 4 set at anangle to each other, commonly an angle of ninety degrees. A fly wheel 5on the crank shaft forms a carrier for the governor. The valvemechanisms of these engines are controlled by the eccentrics 6 and 7. Itwill be understood that any valve gear may be supplied which is capableof receiving its motion from a crank or eccentric, such as 6 and 7 AWeight arm 8 is mounted on a shaft 9 being locked with the shaft by akey 10.' The weight armhas the weights 11 and 12 and one end' of the armis connected with a spring 13 by a link 14. The spring is mounted on abracket 15 having the usual spring adjustments 16. The eccentric 7 issecured to the weight arm by screws 17 and the eccentric iscounter-balanced by a weight 18. So far the governor follows the form ofconstruction illustrated in the patent to Shepherd, No. 529,507, datedconnected to an arm 26*by a pin 25. The arm 26 extends from an eccentriccarrier 27 which is pivotallymounted on a pin 28, the bearing beingprovided with the rollers 29 to reduce friction; The pin 28 extendsthrough thehub and is secured thereinby a cap screw 30 and theeccentriccarrier 27 issecured on the pin by a plate 31', the plate beingsecured tothe end of the pin by screws 32. An arm 33 extends from theeccentric carrier to the eccentric'(). A weight 34 is provided forcounter-balancing the eccentric 6. The eccentric 6 has an opening 34which permits the swinging of the eccentric across the shaft in theusual manner and the eccentric 7 has an opening 36 for the same purpose.

In the operation of the device it will readily be seen that with theswinging of the weight arm under the influence of centrifugal force andinertia the motion is communicated to the eccentric 7 in the usualmanner and at the same time the motion is communicated through the shaft9 to the rock arm 21 and through the link 23- to the arm 26 and inconsequence to the eccentric 6. By following the movement itwill readilybe seen that as the center of the eccentric 7 is carried toward thecenter of the shaft the eccentric 6 is similarly carried toward thecenter and conversely when the eccentric 7 moves outwardly the eccentric6 is also carried outwardly. In this way it will be seen that the valvegears for two engines having their cranks set at an angle may be movedin exact conformity with each other and in response to the action of asingle governing mechanism. The mounting on the shaft and in the carrieris simple and rugged and inasmuch as the pulsations on the governingmechanism from the valve gears are at different intervals overnin weihts of suflig e cient power to handle one of the engines will besuflicient to handle both engines.

While I have shown eccentrics moving across the shaft I do not wish tobe limited I to eccentrics or cranks of such dimension.

Any eccentric or crank capable of producing the requiste reciprocatingor swinging motion suitable for the valve gear will satisfy the purpose.

It Will be noted that the angular inertia force and centrifugal force ofthis governor act in harmony, that is to say, not only does thecentrifugal force tend to regulate the speed but the angular inertia ofthe weights also tends to regulate the speed so that these two forcesboth operate together.

What I claim as new is 1. In an engine, the combination of a crankshaft; two cranks on the crank shaft arranged in angular relation; twoeccentrics one having operative relation to each crank respectively; agovernor sensitive to centrifugal force and angular inertia; andconnectionsbetween the governor and eccentrics moving said eccentricstoward and from the axis of the shaft in unison.

2. In an engine, the combination of a crank shaft; two cranks on thecrank shaft arranged in angular relation; two eccentrics one havingoperative relation to each crank respectively; a governor carried by thecrank shaft'said governor being sensitive to centrifugal force andangular inertia; and connections between the governor and eccentricsmoving said eccentrics toward and from the axis of the shaft in unison.

3. In a governor, the combination of a carrier; a governor weightmounted on one side of the carrier; an eccentric carried by and fixedrelatively to theweight and at the same side of the carrier; a shaftsecured to the weight and extending through the carrier; a rock arm onthe shaft; a second eccentric mounted on the opposite side of thecarrier and having a movement toward and from the axis of the carrier atan angle to the movement of the first-mentioned eccentric; and means forcommunicating the movement of the rock arm to the second eccentricwhereby the two eccentrics move toward and from the axis of the carrierin unison.

In testimony whereof I have hereunto set my hand.

ROBERT C. STEVENS.

